Question

Convert into moles 12 g of oxygen

Answer 1

Given:

• 12g of oxygen is given to us.

To Find:

• The number of moles .

Solution:

Molecular mass of oxygen = 8×2g =16 g .

Number of moles = ? (n)

Formula : $\large{\boxed{\red{\sf{n=\dfrac{Weight\:in\:gram}{Molecular\:mass}}}}}$

$\sf{ \longmapsto n=\dfrac{12g}{16g}}$

$\sf{ \longmapsto n =\dfrac{3}{4}}$

${\underline{\purple{\sf{\leadsto n =0.75}}}}$

Note :

• This formula can be used when some mass of a compound or element is given.

Answer 2

Explanation:

Given:12 gm of oxygen. To find :its mole number we know the molecular mass of oxygen --->. 8 ×2=16. .no of moles..= n. using formula. --> weight in gram\ atomic mass. ----->so n= 12 /16. n=3/4. n =0.75. . mark me as brainlist.....